Car truck



May 1, 1956 R. B. COTTRELL CAR TRUCK 3 Sheets-Sheet 1 Filed Sept. 29,1950 IN V EN TOR. Pafieaf ,5 65!!2'6/1 y 1, 1956 R. B. COTTRELL2,743,682

CAR TRUCK Filed Sept. 29, 1950 5 Sheets-Sheet 2 Q? Q4956 l T f' 1 7/ INVEN TOR.

May L 1956 R. B. COTTRELL CAR TRUCK 3 Sheets-Sheet 5 Filed Sept. 29,1950 INVENTOR.

21 05612 ,5 C'oi/re/Z @Bllk United States Patent CAR TRUCK Robert B.Cottrell, Chicago, Ill., assignor to American Steel Foundries, Chicago,111., a corporation of New Jersey Application September 29, 1959, SerialNo. 187,409

2 Claims. (Cl. 105-497) This invention relates to railway car trucks.

A primary object of the invention is to devise a novel truck comprisingsimplified side frames and bolster to obtain a light weightexceptionally strong construction which may be easily assembled anddisassembled.

A further object of the invention is to provide novel side frames of abeam type wherein the various sections are formed and arranged toprovide an enclosure for the bolster supporting springs and guides forthe bolster and at the same time afford an exceptionally strongconstruction.

In several embodiments of the invention, friction means are incorporatedfor controlling relative movements between the bolster and side framesat opposite sides of the truck and to damp spring oscillations.

These and other objects of the invention will become more apparent fromthe specification and the drawings, wherein:

Figure 1 is a fragmentary composite side elevational view of one form ofthe invention, the right half of the view being an inboard elevationalview of the side frame and cross sectional view of the bolster, the lefthalf being an outboard elevational view of the side frame and thebolster;

Figure 2 is a fragmentary top plan view of the truck with the bolster atthe right half removed;

Figure 3 is a sectional view taken substantially on the line 3-3 ofFigure 1, the bolster being shown in side elevation;

Figures 4 and 5 illustrate another embodiment of the invention, Figure 4being the fragmentary side elevational view thereof, and Figure 5 beinga fragmentary top plan view thereof; and

Figures 6 and 7 illustrate a further embodiment of the invention and arecomparable to Figures 4 and 5 respectively.

Describing the invention in detaail and referring first to theembodiment shown in Figures 1 to 3, the truck comprises a side frame ateach side in the form of a beam type member 2, said member having adepressed central portion, generally indicated 4, and upwardly divergingend portions, generally indicated 6, 6. The side frame comprises abottom transverse web 8, which extends substantially horizontal in thecentral portion of the frame and diagonally upwardly at the end portionsof the frame, and merges at its ends into the inboard sides of journalboxes 10, Ill diagrammatically illustrated. The wall 8 is joined at itslateral edges to the bottom edges of substantially vertical inboard andoutboard walls 12 and 1d. The side walls are joined at their upper edgesat the end portions of the frame by upwardly sloping transverse webs 16,16, which are convexed upwardly in the regions immediately adjacent toand above the journal boxes. The top walls 16 are bifurcated as at 18 atthe ends of the frame and terminate with the sidewalls 12 and 14 at theoutboard sides of the journal boxes. It will be seen that the side walls12 and 14 merge with the inboard sides of the journal boxes adjacent totheir upper ends and with the top sides of said boxes. 10 are shown onlyin outline form inasmuch as they are of conventional design such aspresently used in railway service.

The upper edges of the side walls 12 and 14 at the central zone of theside frame are connectedto a spring seat wall Zll, said wall 20 beingslightly widened and extending a small distance inboardly and outboardlyof the walls 12 and 14. The inboard and outboard edges of the wall 20merge into lower edges of substantially vertical inboard and outboardwebs 22 and 24, said webs 22 and 24 extending lengthwise longitudinallyof the side frame and curving at their ends into the adjacent portionsof the inboard and outboard walls of the end portions 6, 6 of the frame.

The wall 20 comprises a lower or depressed portion 26 centrally thereofand a stepped-up end portion 28 at each end thereof. The portion 26 isflanged upwardly as at 30 at each end and merges with the adjacent endof portion 28, and the outer end of each portion 28 is formed with anupwardly extending flange 32 which joins the inboard and outboard webs22 and 24. The upper ends of webs 22 and 24 are provided with outturnedflanges 34 and 36, said flanges strengthening the construction and attheir ends tapering into the inboard and outboard walls 12 and 14 of theend portions in the areas of the inner ends of walls 16, 16. Thus itwill be seen that the construction of the webs 22 and 24 and the wall 20forms a convenient deep spring pocket 38. The webs 22 and 24 and theirslight spacing inboardly and outboardly of the walls 12 and 14 and theirmerger at opposite ends with the inner ends of the end portionsmaterially strengthen the central portion of the side frame and itsjuncture with the end portions of the frame. The stepped arrangement ofthe spring seat wall also strengthens the central zone of the frame.

The central zone 4 of the frame is provided on its top side at oppositeends of the spring seat with upstanding extensions, generally indicated40, 40. Each extension 40 comprises an upright arcuate web 42,presenting a curved guide surface 44 facing toward the center of theframe. The lower edge of each web 42 merges in the area between theplanes of the walls 12 and 14 with the inner end of the adjacent wall16. The lateral end portions of the wall 42 are continued at their loweredges for a short distance on the top sides of the substantiallyhorizontal flanges 34 and 36. The lateral edges are flanged outwardly asat 46 and 48 and tapered downwardly. The outer side of each web 42 isformed at its crest integral with a vertical edge of a gusset 50, thelower edge of the gusset merging with the top side of the adja-' centweb 16. Each gusset 50 is positioned substantially centrally between theinboard and outboard sides of the related end portion 6.

A group of coil springs 52, 52 is disposed within the pocket 33. Asherein shown, two sets of springs 52, 52

are seated at their lower ends on portion 26 of web 20 and one set ofsprings 52 is seated on each portion 28.

All of the sets of springs 52, 52 are of substantially equal height andthe central sets of springs seat against a bottom wall 54 of a bolster,generally indicated 56. Each end set of springs 52 seats against abottom web 58 of a transversely extending wing 60 on the adjacent sideof the bolster. The wall 53 of each wing 60 is offset upwardly withrespect to the wall 54 and is flanged at its inner end as at 62, theflange 62 merging at its lower lateral edge with the bottom wall 54. Theouter edge of the wall 53 is connected to a top wall of the wing andbolster by a peripheral wall 64, said wall 64 in the area adjacent tothe, guide surface 44 having an outer guide surface 66 concentric withthe adjacent surface 44. The wall 64 is cut out at the outboard end ofthe bolster as The journal boxes.

References Cited in the file of this patent UNITED STATES PATENTS BarberJuly 12,, 1910 Noble Oct. 16, 1923 6 Whitr idge Apr. 16, 1929 Kadel May7, 1929 Busch Aug. 22, 1939 Busch Aug. 22, 1939 Eksergian Feb. 11, 1941Martin Ian. 11, 1944 Webb Jan. 11, 1944 Cottrell Feb.6, 1945 CottrellApr. 16, 1946

